<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title></title>
	<style type="text/css">
		*{
			margin: 0;
			padding: 0;
		}
		.box{
			background-image: url(../1.jpg);
			width: 520px;
			height: 280px;
			margin: 100px auto;
			position: relative;
		}
		.one{
			position: absolute;
			left: 0;
			top: 50%;
			margin-top:-20px;
			}
		.two{
			position: absolute;
			right: 0;
			top: 50%;
			margin-top: -20px;
/*			设置50%  margin-left:    自身宽度的一般;*/
/*			设置50%   margin-top:    自身高度的一般;*/
			}
		.only{
			position: absolute;
			bottom: 0;
			width: 90px;
			height: 15px;
			left: 50%;
			bottom: 30px;
			margin-left: -35px;
			background-color: #887676;
			border-radius: 15px;
			line-height: 15px;
			text-align: center;
		}
		.three{
			display: inline-block;
			width: 8px;
			height: 8px;
			background-color: white;
			border-radius: 50%;
			margin: 3px;
		}

		

	</style>
</head>
<body>
		<div class="box">
			<div class="one">
				<img src="../2.png">
			</div>

			<div class="two">
				<img src="../3.png">
			</div>

			<div class="only">
				<div class="three"></div>
				<div class="three"></div>
				<div class="three"></div>
				<div class="three"></div>
				<div class="three"></div>
			</div>
			
		</div>


		

	</div>





</body>
</html>